If you sign up and log in, you’ll be able to run other interesting queries like every webserver in Nigeria (find your favorite spammer!).

I’ve personally been using Shodan heavily to calibrate a webapp fingerprinter, and the biggest pain has been inability to export more than 1000 results. I emailed John and begged for the feature and after some back and forth, as of Sunday night, it’s ready! If you click the Export button, you’ll now be prompted with the number of hosts you want to export (in increments of 1000). He says it will accommodate up to a million hosts, but might take a while to make the xml available.